<!DOCTYPE html>
<html>
<head>
    <title>Title</title>
</head>

<script src="js/jquery-3.2.0.min.js"></script>
<script src="js/vue.min.js"></script>
<body >
<div id="part1">
    <span>我就是登陆界面,我还带来了后台数据</span><span >{{param1.da1}}</span>
</div>

</body>
  <script>
      var tianru="原始数据 ";
    var app=  new Vue({
          el:"#part1",
          data:{
              param1:{"da1":"数据1","da2":"数据2"}
          }
      })
      tianru="修改后的数据";

      $.post("/getdata",function (data) {
            console.log(data);
         //app.param1=data;
      })


  </script>
</html>